Global IANA Time Zone Observatory
Canonical World Time Zones
Explore all 419 canonical IANA time zones across every continent. Filter by region, offset, and city name with live precision atomic timekeeping.
419 Canonical Zones
Sub-Millisecond NTP Precision
195+ Countries Covered
Complete IANA Database (419 Zones)
Search & Filter Global Time Zones
Showing 419 of 419 time zones
Showing 60 of 419 matching time zones
Frequently Asked Questions About Global Time Zones
Learn how global time zones, daylight saving offsets, and IANA standards operate.
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While Earth is divided into 24 standard 15-degree longitudinal hourly time zones, there are currently over 400 canonical IANA (Olson) time zone identifiers. These account for daylight saving rules, half-hour and 45-minute offsets (such as India UTC+5:30 or Nepal UTC+5:45), and historical geopolitical shifts.
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